#!/bin/sh
#
# Copyright (C) 2015, 2017  Etersoft
# Copyright (C) 2015, 2017  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

__epm_orphan_altrpm()
{
    docmd apt-cache list-extras
}

epm_autoorphans()
{

[ -z "$*" ] || fatal "No arguments are allowed here"

case $BASEDISTRNAME in
    alt)
        # ALT Linux only
        assure_exists /usr/share/apt/scripts/list-extras.lua apt-scripts
        if [ -z "$dryrun" ] ; then
            echo "We will try remove all installed packages which are missed in repositories"
            warning "Use with caution!"
        fi
        epm Upgrade || fatal
        info "Retrieving orphaned packages list ..."
        local PKGLIST=$(__epm_orphan_altrpm \
            | sed -e "s/\.32bit//g" \
            | grep -v -- "^eepm$" \
            | grep -v -- "^distro_info$" \
            | grep -v -- "^kernel")

        # TODO: implement for other PMTYPE
        info "Retrieving packages installed via epm play ..."
        local play_installed="$(epm play --list-installed-packages)"
        if [ -n "$play_installed" ] ; then
            echo "Skip follow packages installed via epm play: $(echo $play_installed | xargs -n1000 echo)"
            PKGLIST="$(estrlist exclude "$play_installed" "$PKGLIST")"
        fi

        # TODO: implement for other PMTYPE
        local hold_packages="$(epm mark --short showhold)"
        if [ -n "$hold_packages" ] ; then
            echo "Skip follow packages on hold: $(echo $hold_packages | xargs -n1000 echo)"
            PKGLIST="$(estrlist exclude "$hold_packages" "$PKGLIST")"
        fi

        if [ -n "$PKGLIST" ] ; then
            if [ -z "$dryrun" ] ; then
                showcmd epm remove $dryrun $force $PKGLIST
                confirm_info "We will remove packages above."
            fi
            info
            info
            docmd epm remove $dryrun $force $(subst_option non_interactive --auto) $PKGLIST
        else
            echo "There are no orphan packages in the system."
        fi
        return 0
        ;;
esac

case $PMTYPE in
    apt-dpkg|aptitude-dpkg)
        assure_exists deborphan
        showcmd deborphan
        a='' deborphan | docmd epm remove $dryrun
        ;;
    #aura)
    #    sudocmd aura -Oj
    #    ;;
    yum-rpm)
        docmd epm upgrade
        assure_exists package-cleanup yum-utils
        showcmd package-cleanup --orphans
        local PKGLIST=$(package-cleanup -q --orphans | grep -v "^eepm-")
        docmd epm remove $dryrun $PKGLIST
        ;;
    dnf-rpm)
        # TODO: dnf list extras
        docmd epm upgrade
        assure_exists package-cleanup dnf-utils
        showcmd package-cleanup --orphans
        local PKGLIST=$(package-cleanup -q --orphans | grep -v "^eepm-")
        docmd epm remove $dryrun $PKGLIST
        ;;
    urpm-rpm)
        if [ -n "$dryrun" ] ; then
            fatal "--dry-run is not supported yet"
        else
            showcmd urpme --report-orphans
            sudocmd urpme --auto-orphans
        fi
        ;;
    #emerge)
    #    sudocmd emerge --depclean
    #    assure_exists revdep-rebuild
    #    sudocmd revdep-rebuild
    #    ;;
    pacman)
        if [ -n "$dryrun" ] ; then
            info "Autoorphans packages list:"
            sudocmd pacman -Qdtq
        else
            sudocmd pacman -Qdtq | sudocmd pacman -Rs -
        fi
        ;;
    slackpkg)
        # clean-system removes non official packages
        sudocmd slackpkg clean-system
        ;;
    eopkg)
        sudocmd eopkg remove-orphans
        ;;
    #guix)
    #    sudocmd guix gc
    #    ;;
    #pkgng)
    #    sudocmd pkg autoremove
    #    ;;
    zypper-rpm)
        # https://www.linux.org.ru/forum/desktop/11931830
        assure_exists zypper zypper 1.9.2
        # For zypper < 1.9.2: zypper se -si | grep 'System Packages'
        sudocmd zypper packages --orphaned
        # FIXME: x86_64/i586 are duplicated
        local PKGLIST=$(zypper packages --orphaned | tail -n +5 | cut -d \| -f 3 | sort -u)
        docmd epm remove $dryrun --clean-deps $PKGLIST
        ;;
    xbps)
        if [ -n "$dryrun" ] ; then
            fatal "--dry-run is not supported yet"
        else
            sudocmd xbps-remove -o
        fi
        ;;
    *)
        fatal "Have no suitable command for $PMTYPE"
        ;;
esac

}
